Cyrus Thomas

The Problem of the Ohio Mounds

Day Symbols of the Maya Year / Sixteenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1894-1895, Government Printing Office, Washington, 1897, pages 199-266

Aids to the Study of the Maya Codices / Sixth Annual Report of the Bureau of Ethnology to the / Secretary of the Smithsonian Institution, 1884-85, / Government Printing Office, Washington, 1888, pages 253-372